Pali mitundu iwiri ya zipangizo zopangira aluminiyamu, imodzi ndi "fast ufa" yopangidwa ndi trialumina kapena Bayer stone, ndipo ina imapangidwa ndi aluminiyamu kapena aluminiyumu mchere kapena zonse nthawi imodzi. X, ρ-alumina ndi kupanga X, ρ-alumina X, ρ-aluminium ndiye r ...
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